| 2278021 | Composite, with 3 known prime factors. Cofactor is composite. Trial Factored to 268 TF target 262 |
| Factored | |
| P-1 factors | |
| ECM | | Digits | B1 | Curves |
|---|
| 25 | 50000 | 280 / 280 | | 30 | 250000 | 123 / 640 |
Estimated T-Level: 26.0 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. |
| PRP Cofactor | | Status | Proof | Date | User | Residue | Number of
known factors | Shift | Type | Base |
|---|
| Factored | PRP without proof (not generated) | 2017-10-11 | Oliver Kruse | 9E2CCCF60888F4BE | 2 | 0 | 1 | 3 | | Factored | PRP without proof (not generated) | 2017-11-21 | storm5510 | 9E2CCCF60888F4BE | 2 | 972553 | 1 | 3 | | Verified | Certified Good | 2023-12-02 | COMPUTRON9001 | 55C419077407116A | 3 | 1940366 | 5 | 3 |
|
| History | | Date | User | Type | Result |
|---|
| 2023-12-02 | gregor_krannich | CERT | Proof certified good | | 2023-12-02 | COMPUTRON9001 | C-PRP | M2278021/237456352999/26629217761548251671/3616811080967055377719 : 55C419077407116A Proof Certified Good
Proof Power: 7
| | 2023-12-02 | COMPUTRON9001 | F-ECM | Factor: 3616811080967055377719 / ECM curve 9, B1=50000, B2=35542122, Edwards Sigma=4311939532553492 | | 2017-11-21 | storm5510 | C-PRP | M2278021/237456352999/26629217761548251671 : 9E2CCCF60888F4BE | | 2017-10-11 | Oliver Kruse | C-PRP | M2278021/237456352999/26629217761548251671 : 9E2CCCF60888F4BE | | 2016-04-08 | alpertron | F-PM1 | Factor: 26629217761548251671 / B1=500000, B2=15000000 |
|
